I'd stick with a gift certificate, Harley owners are picky as far as what they want on their bike, etc.
:tpd:
I have a friend who keeps floating questions around the subject of I wonder what I can get him for his bike (he's a new HD owner of a tricked out RoadKing Custom), I keep putting him off with comments like "It's about how I want it" (lie), or " I don't know, I'll know it when I see it". Not that I don't appreciate the gesture, it's just my vision and I don't want to distort it with something that's not there. I'd really hate to be put into the position of making a good friend feel bad by not including the hard thought out bling they thought I might like for my ride.
Maybe you can hook up with one of us on the HD shirt trade threads and include an otherwise not reachable shirt to wrap it in? I'm in Denver if that helps.
Just my opinion, actual mileage may vary.